Manafort was used by Mueller as a useful idiot to make Trump believe he had the upper hand. Trump thought he knew exactly what Mueller was looking for, because Manafort was his mole in his eyes. Mueller let Manafort think he had the upper hand and was outsmarting Mueller. However, immediately after Trump published his written answers to Mueller, Mueller reported that Manafort had lied in his statement regard the same questions that Trump just submitted his answers to.. Mueller knew that Manafort was runnning and telling Trump everything and set Trump up. Now, Trump has likely submitted the same answers given by Manafort to the SC, and in turn, perjured himself.